Guar, galactomannan from seeds

Galactomannan-1,2 (m = 1) Guar gum from Cyamopsis tetragonoloba seeds... 

Dimethyl-D-mannose has been isolated from the hydrolysis products of the methylated galactomannans from carob seed gum14-18 and from guar gum,16 17 and also from mannocarolose,8t 18 a polysaccharide synthesized by Penicillium charlesii G. Smith. The synthesis of this sugar, which has not been obtained crystalline, has been accom-... 

Galactomannans are neutral polysaccharides isolated from seeds (carob, guar, locust bean, tara, etc.). Their main chain is made of [(1 4)- 3-D-Man] (Man = mannose M units) with different degrees of substitution on 0-6 with a-D-galactop5Tanosyl units (G). Their composition (or M/G ratio) is easily determined by H NMR. 

Isol. from the partial acid hydrolysates of galactomannans from guar (Cyamopsis tetragonoloba). Cassia occidentalis, Sesbania aegyptiaca and Ipomoea fistulo-sa. Isol. from seed galactomannan of Cassia javanica. Cassia marylandica and Cassia auriculata. Cryst. + H2O (EtOH). Mp in-rw. [a]g +93 (c, 1.0 in H2O). 

Bourbon AI, Pinheiro AC, Ribeiro C, Miranda C, Maia JM.Teixeira JA, et al. Characterization of galactomannans extracted from seeds of Gleditsia triacanthos and Sophora japonica through shear and extensional rheology comparison with guar gum and locust bean gum. Food Hydrocoil 2010 24(2—3) 184-92. 

Galactomannans have been treated with a-D-galactosidase, and the extent of removal of D-galactose has varied considerably.88,101 105 With enzymes from lucerne104 and guar seed,105 essentially all of the D-galactosyl groups... 

A way of reconciling the observed proportions of mannobi-, tri-, and tetra-oses and heterosaccharides,16113 released by guar-seed jS-D-mannanase (from hot-water-soluble carob galactomannan), with this model, would be if the enzyme preferentially hydrolyzes appropriate, unsubstituted d-mannosyl residues (as in 31) then, it would only be able to hydrolyze on the reducing side of a substituted D-mannose (as in 32) if there were a... 

Galactomannans Made primarily of a linear mannose chain with galactose side groups Obtained from the powdered endosperm of certain seeds, guar gum Thickening agent and tablet binder... 

In no case is one of these galactomannans available and used as a pure polysaccharide. Rather they are the ground endosperm of the seeds of the plant from which they are obtained. As a result, the commercial gums also contain fiber, protein, ash, and other constituents. As already indicated, the polysaccharide present in guar gum is called guaran. Chemical names have not been given to the other galactomannans. 

Yes, it is obtained from germinated guar seeds and was a crude guaranase mixture. The crude mixture was capable of bringing about a rapid and extensive modification of the galactomannan. 

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